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    <script>
        console.log(null == false);             //           false
        console.log(null == true);            //   false
        console.log(undefined == false);//false
        console.log(undefined == true); //false
        console.log(undefined == null); //true
        console.log(undefined == undefined);// true
        console.log(null == null); //true
        console.log(null == NaN); //false
        1
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